2/3/3 [email protected] took 3 tries. Boosted +2 red, +50% match damage on r/y and b/p. I am sure that this strategy would work as low as 1/3/1. Maybe even 1/2/1 with +100% match damage boosts and no margin for error.

Strategy details coming as soon as i get home and can use a keyboard.

Added details:

At level 111 with 3 covers, Gwen's red does about 3.2k. Fortunately, miles is pretty weak for a 4*, having just under 14k health. So the goal is to collect 18 red ap while gwen + miles combine to produce at least 9 web tiles. That will allow you to use red 3 times for 9.6k damage. Add in about 4.2k of match damage and you win! It may be possible to use the same technique with just 2 red covers, but that means only doing about 2.5k per attack, for a total of 7.5k with 3 casts. getting everything else from match damage can be tricky.

Since you need lots of red for this strategy, start with +2 r/y ap. Them throw in +50% r/y and +50% b/p match damage. You could be more efficient and go with +100% all damage boosts, but I was low and those are expensive (probably essential if you have fewer than 3 red).

Once the match starts DENY RED. You need tons of red for this plan to work, and miles' red is fairly dangerous for low level gwens. If there are no viable red matches on the board, then collect purple. the idea is to get at least 6 purple and then hold it until the board has multiple matches and you can't deny miles from getting the colors he needs. When that happens you can stun him for a round and collect all the important color matches (the stun can also be useful if you need to make a match that contains web tiles and don't want to feed miles more ap). The difference between 1 and 3 purple covers is relatively minimal (just extra web tiles), but 4 covers will give you a 2 turn stun which is a big boost. Using this careful deny + stun-when-necessary strategy, you have a decent chance of collecting the colors you need before miles can go invis or get off a red. Once you get close to 18 red ap, you should bait miles into using his yellow until there are enough web tiles on the board (supplement with your own purple and yellow if you have enough ap/covers for them to be effective). This will all take a pretty long time, so you should have done enough match damage to get miles down below 10k, so 3x gwen's red should be enough to finish him.

It will take a fair bit of board luck (especially early on), but I think this strategy is definitely repeatable, so everyone with at least 3 red covers and enough iso to put gwen at 111 or higher should make more than a few attempts.

P.S. I don't think victory without any red covers is very likely at all. Maybe if you had enough other covers to level up to 150+ and used full match damage boosts and got a perfect board. But that's really expensive and hard to pull off.

1/2/4 kate @ 111. Used +2 b/p ap. Goal is to get at least 16 black and 10 purple. Blue was too slow and weak for me with just one cover. Save all powers for a single strike to avoid his healing. The good news is that he is weak with just 11k health. The bad news is you dont have much time because 5* match damage is high. Deny black as those strikes will kill you quickly. Then collect purple, then. Fire everything at once and you can hopefully drop him by the time the purple cd resolves. Add match damage boosts if you have fewer covers.